What CRM-like tools would you recommend for a startup with some field service involved?

Hey there! Recently, I've run a small research on whether it is possible to use CRM to efficiently manage field employees (a friend of mine is running one). The results were interesting, however I still did not make a final decision on how to proceed. For now, I've shortlisted three tools:

• https://www.planadoapp.com/, an FSM tool that claims to be more effective as a CRM.

• https://www.eway-crm.com/, this works with Outlook, which is one of our mail clients we use.

• https://www.espocrm.com/, some folks on Reddit advised this, but I am concerned whether this is a really good fit for a field management.

Salesforse is out of the budget, can't count on it.

What would you choose among these three, or maybe there are other alternatives?